> What was wrong w/ _GroupConverter_?

I felt `GroupConverter` was no longer right as the class now does not only the group conversion but also the descriptor handling.

The `...Support` suffix to me suggests functionality provided for re-use in a non-static way, similar to e.g. `PropertyChangeSupport`. `GroupConversionHelper` would work for me, too (Personally I don't mind a `...Helper` class not to be static).

I'm no big fan of `GroupConversionMetaData`, as it is not really a `XyMetaData` object on its own right, but is just re-used by the `Cascadable` implementations. So if you dislike `GroupConversionSupport`, maybe `GroupConversionHelper`?